Rotary drying or torrefying apparatus



Nov. 9 1926.

P. SCRIVE ROTARY DRYING OR TORREFYING APPARATUS Filed August 11, 1925Patented Nov. 9,192fi.

warren srarss BAUL scams. or rams, FRANCE.

1 t eny-2*;

ROTARY-DRYING on' roannrrrns arrnnerus.

Application filed August 11, 1925, Serial no. ia'esifaad in France a ustad se-i.

The present invention con'cernsan improvement in rotary drying ortorrefyin'g" apparatus, which is characterized in that the drying ortorrefying apparatus const1tuted by an inner framework on which aredetachably secured. the side walls.

Such an arrangement allows of effecting with a great facility thecleaning of the drum, it will therefore be preferably adopted in casethe drying apparatus must serve'for several materials successively,especially when these materials must preserve a great degree ofpureness.

The accompanying drawing illustrates by way of example only, a form ofcarrying out the invention.

Fig. 1 is an end and sectional view of the drying drum;

Fig. 2 is a sectional view of a' detail of assemblage Fig. 3 is anotherdetail view, in section.

The essential of the invention consists-in mounting the side walls 1 ofthe drum on an inner framework 2 in an easily detachable manner.

In the example illustrated, the framework is constituted by longitudinalbearers 2 of angle iron the webs of which form an angle of 120, theseiron members being held by radial arms 2* so that their edges coincidewith those of a hexagonal prismatic surface.

It is to be noted that this method of con struction of the framework iscompletely independent of the invention and that this framework can bedevised in any manner.

In the example chosen, the detachable side walls 1 are formed from sheetiron plates.

The walls 1 carry staples 3 riveted or secured in another manner,near'o'ne of the longitudinal edges; these staples, as shown in Fig. 2,lit in one of the webs of the iron members 2 so as to hook thereon. Onthe other longitudinal edge, opposite the staples 3, the plates 1 areprovided with notches 4, which. upon assemblage, allow the passage ofthe stems ofthe bolts 5 screwed or secured in another manner in thesecond web of-the iron members 2; wing nuts 6, or the like, are screwedon the bolts 5 for securing the whole. For facilitating the assemblageor the disassemblage, the plates 1 are provided with handles/7, securedin any suitable manner and for instance by riveting.

For disassembling, it sufices to unscrew deep forallowing the plate 1 toeffect a translation atright angles'to the iron members Qthistranslation' having for effect to disengage the staples 3 from theiron members 2 and thus release the plate which can be easily removedand separately cleaned with the greatest facility.

The plates 1 can be perforated on all or a portion of their surface; inthe example chosen, they internally carry perforated buckets 8 whichserve to raise the material for subsequently discharging it in thefollowing buckets. The perforations allow the hot gases to pass throughthe material'contained in the Various buckets such as 8.v

It is obvious that the chamber in which is placed the drum, which can betaken to pieces, must have at least aside partition capable of beingopened for givingaccess to the drum and permitting the removal of theplates forming the sidewalls of the same,

for the purpose of cleaning them. The plates once removed, the cleaningof the framework can be efiected with the greatest ease.

Of course, the arrangements above described'by way of example have beenindi' cated only for giving a better understanding of the features ofthe invention; these arrangements can receive numerous modificationswhich, as they do not alter in any way the essential feature nor thepurpose aimed at are included within the scope of the invention.

For instance, the hexagonal shape illustrated can be replaced by anyother shape,

provided the panels remain detachable.

The drum can also be made of metal-or any other suitable material; forobtaining walls resisting to the action of acids, use can be madeforinstance of cement or of fibre-cement. a

That I claim as my invention and desire to secure by Letters Patent is:

1. In a rotary drier, a drum comprising longitudinal, parallel members,means for assembling and holding said members to form a frame, andplates removably fastened on said longitudinal frame members, saidplates alone constituting the side walls of the drum. I

2. In a rotary drier, a drum comprising longitudinal,parallel membersarranged to form a frame, plates for constituting the outer walls ofsaid drum, and means for removably fastening said plates on saidlongitudinal frame members.

3. A rotary drum for drying and roasting, con'iprising longitudinal,parallel members angle-shaped in cross-seetionand arranged to form aprismatic frame, plates adapted to form tile Walls-0t said drum, andmeans on said longitudinal frame members on one side and on the plateson the other side for removably fastening said plates on saidangle-shaped frame members.

igitudinal beams angle-shaped in cross paraiielly arranged to form 21 lmsection and frame, an lnner "frame connected with the outer trame 'oyradially disposed arms, and plates removably tastened on said longitu ina rotary drier, a drum comprising dinal beams said plates alone formingthe Walls of the drum 5. in a rotary drier or roaster, a drum,

comprising a frame of longitudinal angler PAUL soiarvE.

